Gasoline stove



MW n w y Gt E. PICKUP I GASOLINE STOVE Filed March V221, 1955 2 sheets-sheet 1 W M, #h G'. E; PlcKUP GASOLINE sTovE Filed March 24, 1935 2 Sheets-Sheet 2 Patented May 19, 1936 UNITED` STATES GASOLINE STOVE George E. Pickup, Newark, Ohio,` assignor to The Wehrle Company, Newark, Ohio, a corporation Application March 24,

Claims.

Theginvention pertains to gasoline stoves, and

has particular reference to animproved gen--v erator for converting the liquid fuel into a gaseous fuel for purposes of combustion, l

The primary object of the invention is to provide a new and improved generating means for gasoline cook stoves and the like with a view to eliminating difculties heretofore experienced withftheaccumulation. of carbon within the genlO eraton.

Gasoline stoves ofthe prior art have commonly employed generators in the form of a single tube communicating at one end with a source of fuel and having at its other' end 'a needle valve for controlling the discharge of the fuel in gaseous form to a manifold', said valve being operated by `a rod extending through the tube for manual operation at the front of the burner box. In the use of such stoves, an unavoidable accumulation of carbon occurs within the tube, and the difficulty above referred to concerns more especially the clogging of the discharge orifice controlled by the needle valve, said orifice: being ofi avery smallI diameter, in the order of a few 25. thousandths of an inch.,V

`My. invention` more specifically stated, aims to provide an improved generator embodying two parts or sections, one of-whichreceives the fuel from the supply tank and constitutes in effect a; vaporizing chamber, and the other of` which receives the fuel in vaporized form and delivers it to the manifold.

` A` further object is to provide a generator having primary and secondary parts of theA character abovereferredflto, with the vaporizing member arranged for convenient removal4 for the purpose oft removing thecarbon therefrom without disturbing the needle valve mechanism in. the other member.

A general `object `is toe provide a. burnerV structure having'an improved generator of the charact'er'set` forth; which is simple: and inexpensive inyconstruction, and reliable in. operation.

The objects ofzthe invention thus generally stated together with other andancillaryadvantages; are obtained by the. construction .and arrangement illustrated in the accompanying drawings forming apart hereof in which:

Figurev lfis a fragmentary topplan View of a .50 burner structure embodying my invention, the

same being shown in connection with a suitable fuel` supply' tank.

Fig. 2f is a fragmentarysectional viewy taken approximately `inthe planerof` line 2-2 in Fig. 1, but'forr an,` enlarged 'scaleI 1933, Serial No. 662,407

Fig. 3 is a fragmentary transversesectionalview taken approximately in the line of 3-3 of Fig. 2.`

In the preferred embodiment of the invention illustrated, the burner structure comprises a manifold I with which one or more burners are in valve controlled communication. Herein I have shown a main burner 8 lformed in two segmental sectionsy arranged in laterally spaced relation upon an arm Sr of the manifold, and an auxiliary burner I0 communicating with the manifold through the medium of a tubular arm II. Valves I2 and I2 (see Fig. 3) are operated by rods I3 and I 3 extending forwardly through the front wall I4 of the burner box and provided with suitable handles I5.

Also communicating with the manifold through the medium of an arm I6` is4 a.` generator burner I If in the form of an elongated tubular member having in its upper surface a plurality of grids I8; This generator burner is in constant communicationwith the manifold, and is initially supplied with fuel in vapor form by means of a pipe I9 receiving its supply of fuel from the upper'portion of a supply tank 20 and delivering such fuel to the manifold opposite the tubulary arm IB leading to the generator burner. 2| designates` a secondary air mixing device embodied in the manifold at a point adjacent the discharge of the fuel vapor from the pipe I9.

Between the two sections of the main burner 8 and overlying the generatorvburner II'I is my improved generator providing a vaporizing chamber in the form of an elongated tube 22', and a discharge chamberfor gaseous fuel, in the form of an elongated tubular member 23. Thetwo tubes are arranged in parallel relation but offset from each other both laterally and vertically, as shown f clearly in Fig. 3, so that both tubes are disposed above the generator burner I1. Thus both tubes are arranged in a manner such as to receive-heat directly from the burner I 1 without increasing unduly the width of the generator burner or the space between the two sections` o-f the burner 8.

Attheir forward ends the two tubes 22 and 23 are connectedfor intercommunication preferably through the medium of a fitting 24. For this purpose, the tting 24 is constructed to provide an inclined passage 25 communicating at itslower forward end with the forward or outlet endof the tube 22, and at its upper end with a horizontal passage 26 communicatingwith the forward or inlet end of the tube 23; lThus. it will `be observed, thatl by the construction` and arrangement ofthe fitting 24 the vaporizing tube is disposed in a plane below the discharge tube in order to collect the liquid fuel, and passage of the fuel in gaseous form to the discharge tube is retarded. The passage 26 communicating with the upper end of the passage 25 is alined with the forward or inlet end of the tube 23.

Fuel is delivered to the rear or inlet end of the tube 22 by means of a pipe 21 (Fig. l) connected by a detachable coupling 21 to the tube. It is discharged in gaseous form from the rear end of the tube 23, under the control of a needle valve 28, into the forward end of a tubular arm 29 of the manifold. Air is admitted at the point of discharge in the usual manner (not shown) The needle valve 28 is formed on the rear end of a rod 30 which has a screw threaded engagement with a tubular member v3| in the rearend v by means of a handle 33 varies the position of the` needle valve 28 with respect to a discharge nozzle 34 to control the fiow of fuel in a well known manner.

The fuel supplied to the generator by the pipe 21 is under the control of a thermostatically actuated valve 35, which is connected by means of a'pipe 36 with the supply tank 20, the latter being under air pressure delivered to the tank through the medium of a pipe 31 also in the usual manner. The valve is mounted on one end of a bracket 38v vextending transversely of the generator and is actuated by a thermal element in the form ofa rod 39 which passes between the generator burner l1 and the generator tubes 22 and 23. The other end of the rod 39 is anchored at the end opposite the valve to an upwardly extending arm 40 on the bracket4 38. The rod is made o f a material adapted toV expand under heat, and such expansion is utilized to open the valve 35 and permit the iiow of fuel to the gen'- erator through the pipe 21.

k In the operation of the stove, fuel Vapor is supplied to the generator burner I1 by opening a valve 4I controlling the flowof fuel to theupipe I9. Upon" ignitionof this burner, the tubes 22 and 23 become heated andthe valve 35 operated through the automatic action of the thermally responsive rod 39 to permit the supply of fuel to the primary generator tube 22 by the pipe 21. This latter tube, being arranged in closely spaced 'relation tothe generatorr burner, becomes heated rapidly, so that the liquid fuel is converted into a gaseous fuelfor passage into the upper or discharge tube 23. The latter, being also heated by the generator-burner, delivers the fuel in gaseous form into the manifold for consumptionv by one or more of the burners 8 and l0. The generator burner l1 is maintained in operation by reason of its constant communication with the manifold. Experience has shown that the formation of carbon occurs at the point of conversion from liquid to a gaseous form, and it will be observed that I have taken advantage of this fact through the provision of a primary vaporizing chamber in addition to the usual discharge chamber containing the needle valve.- By this arrangement, carbon accumulating as a result of the conversion of fuel from liquid 'to gaseous form is segregated and may from time to time be removed easily without disturbing the controlling valve device. In this latter connection, it will be observed that the primary tube 22 may be easily removed by uncoupling the pipe 21 from the rear end of the tube, and then unscrewing the tube from the fitting 24.

'Ihe thermostatic control of the fuel supply to the generator, while disclosed generally herein, forms no part of the present invention, but is disclosed more fully and claimed in my copending application Serial No. 662,406, filed March 24, 1933.

I claim as my inventionz' 1. In a gasoline stove, the combination with a burner manifold, a main burner communicating with the manifold and having two laterally spaced sections, a generator disposed between said main burner sections and having a tube with a discharge orifice at one end opening intof said manifold, a needle valve controlling said orifice and having an operating rod extending through said tube, a fitting at the end of the tube opposite said orifice and having a passage therethrough for said rod of a diameter greater than said rod, said generator further comprising a vaporizing tube having one end connected with said fitting in communication with said passage and the other end connected with a source of liquid fuel, and a generator burner connected with the manifold and disposed beneath said tubes in heating relation thereto.

2. In a gasoline stove, the combination of a burner manifold, a generator having a tube with a discharge orifice at one end opening into said i manifold, a needle valve controlling said orifice and having an operating rod extending through said tube, a fitting at the end of the tube opposite said orifice and having a passage therethrough for said rod, said generator further comprising a vaporizing tube disposed in a plane below the discharge tube and having one end connected with said fitting in communication with said passage and the other end connected with a source of liquid fuel, and a burner connected with the manifold and disposed in heating relation to said vaporizing tube.

3. In a gasoline stove, the combination of a burner manifold, a generator having a tube with a discharge orifice at one end opening into said imanifold, a` needle valve controlling said 'orifice and having an operating rod extending through said tube, a fitting at the end of the tube opposite said orifice and having a passage therethrough for said rod, said generator further comprising a vaporizing tube having one end connected with said fitting in communication with said passage and the other end connected with a source of liquid fuel, and a burner connected with the manifold and disposed in heating relation to both of said tubes.

4; In a gasoline stove, the combination of a burner manifold, a generator having a vtube with a -discharge orifice at one end opening into said manifold, a needle valve controlling said orifice and having an operating rod extending through said tube, a fitting at the end of the tube opposite said orifice and having a passage therethrough for said'rod, said generator further comprising a vaporizing tube having one end connected with r said fitting in communication with said passage but at a point below said discharge'tube and the other endconnected with a source of liquid fuel, and a burner connected with the manifold and disposed in heating relation to both of said tubes.

5. In a gasoline stove, the combination of a burner manifold, a generator having a tube with a discharge orifice at one end opening into said manifoldja needle valve controlling said orifice and having an operating rod extending through said tube, a fitting at the end of the tube opposite said orice and having a passage therethrough for said rod, said generator further comprising a vaporizing tube having one end connected with said fitting in communication with saidpassage and the other end connected with a source of liquid fuel, and a burner connected with the manifold and disposed in heating relation to both of said tubes, said tubes being spaced apart in laterally and vertically offset relation above the burner.

l 6. In a gasoline stove, a generator having an elongated tubular member with a discharge orifice at one end and an inlet opening at the other end, a needle valve controlling said orifice and having an operating rod extending through said member with an end portion projecting beyond said inlet end, said generator further including a Vaporizing chamber disposed in a plane below said tubular member and having an outlet opening connected with the inlet end of said tubular member and an inlet opening connected with a source of liquid fuel, and a burner in heating relation to said vaporizing chamber and said tubular member.

'7. In a gasoline stove, a fuel supply pipe, a generator` having an elongated tubular member with a discharge orifice at one end and an inlet opening at the other end, a fitting having a passage communicating with said inlet opening, a needle valve controlling said orifice and having an operating rod extending through said member and through said fitting, saidv generator further including a vaporizing tube removably connected with said fitting in communication with the passage thereof, and having an inlet opening at the end opposite the fitting detachably connected with said fuel supply pipe, said tubes being disposed in spaced parallel relation, and a burner in heating relation to said vaporizing tube.

8. In a gasoline stove, a fuel supply pipe, a generator having an elongated tubular member with a discharge orifice at one end and an inlet opening at the other end, a fitting having a passage communicating with said inlet opening, a needle valve controlling said orifice and having an operating rod extending through said member and through said fitting, said generator further having a vaporizing tube removably connected with said fitting in communication With the passage thereof, and having an inlet opening at the end opposite the fitting detachably connected with said fuel supply pipe, said tubes being disposed in spaced parallel relation, and a burner in heating relation to said tubes.

9. A burner structure for gasoline stoves, comprising in combination, an elongated tubular member having a fitting at one end and a discharge orifice at its opposite end, valve means in said member for controlling the discharge of fuel from said orifice and including a stem supported by said fitting, a vaporizing tube having one end detachably connected with said fitting and connected through said fitting with said tubular member, a fuel supply pipe detachably connected with the other' end of said vaporizing tube, and a burner for heating said vaporizing tube.

10. A burner structure for gasoline stoves, comprising in combination, a generator including an `elongated tubular member having a fitting at one end and a discharge orifice at its opposite end, valve means in said member for controlling the discharge of fuel from said orifice, a Vaporizing tube having one end detachably connected with said fitting and connected through said fitting with said tubular member, a fuel supply pipe detachably connected with the other end of said vaporizing tube, said tubular member and vaporizing tube being arranged in spaced parallel relation but offset horizontally from each other and the connection through said fitting forming a passage inclined upwardly from the vaporizing tube and being thereby obstructed to the fioW of fuel in liquid form to the tubular member, and a burner beneath said member and said tube. GEORGE E. PICKUP. 

